Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 551 [Rate centres in NPA 551] [Dial plan for NPA 551]

NXX: 210

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
551-210 A Dumont NJ NBWKNJ17DS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 224      
551-210 0 Dumont NJ   999H BLUEBIRD COMMUNICATIONS, LLC - NJ 224   2018-09-19   
551-210 1 Dumont NJ   264F PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 224   2018-11-30   
551-210 2 Dumont NJ   637C ONVOY, LLC - NJ 224   2020-08-15   
551-210 3 Dumont NJ   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 224   2017-07-29   
551-210 4 Dumont NJ   637C ONVOY, LLC - NJ 224   2020-08-15   
551-210 5 Dumont NJ   197D VONAGE AMERICA LLC 224   2020-07-24   
551-210 6 Dumont NJ   197D VONAGE AMERICA LLC 224   2020-07-24   
551-210 7 Dumont NJ   637C ONVOY, LLC - NJ 224   2020-10-19   
551-210 8 Dumont NJ   637C ONVOY, LLC - NJ 224   2019-05-06   
551-210 9 Dumont NJ   637C ONVOY, LLC - NJ 224   2019-05-06   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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